Actual source code: cJSON.c
1: /*
2: Copyright (c) 2009-2017 Dave Gamble and cJSON contributors
4: Permission is hereby granted, free of charge, to any person obtaining a copy
5: of this software and associated documentation files (the "Software"), to deal
6: in the Software without restriction, including without limitation the rights
7: to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8: copies of the Software, and to permit persons to whom the Software is
9: furnished to do so, subject to the following conditions:
11: The above copyright notice and this permission notice shall be included in
12: all copies or substantial portions of the Software.
14: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15: IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16: FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17: AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18: LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19: OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20: THE SOFTWARE.
21: */
23: /* cJSON */
24: /* JSON parser in C. */
26: /* disable warnings about old C89 functions in MSVC */
27: #if !defined(_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER)
28: #define _CRT_SECURE_NO_DEPRECATE
29: #endif
31: #ifdef __GNUC__
32: #pragma GCC visibility push(default)
33: #endif
34: #if defined(_MSC_VER)
35: #pragma warning(push)
36: /* disable warning about single line comments in system headers */
37: #pragma warning(disable : 4001)
38: #endif
40: #include <string.h>
41: #include <stdio.h>
42: #include <math.h>
43: #include <stdlib.h>
44: #include <limits.h>
45: #include <ctype.h>
46: #include <float.h>
48: #ifdef ENABLE_LOCALES
49: #include <locale.h>
50: #endif
52: #if defined(_MSC_VER)
53: #pragma warning(pop)
54: #endif
55: #ifdef __GNUC__
56: #pragma GCC visibility pop
57: #endif
59: #include "cJSON.h"
61: /* define our own boolean type */
62: #ifdef true
63: #undef true
64: #endif
65: #define true ((cJSON_bool)1)
67: #ifdef false
68: #undef false
69: #endif
70: #define false ((cJSON_bool)0)
72: /* define isnan and isinf for ANSI C, if in C99 or above, isnan and isinf has been defined in math.h */
73: #ifndef isinf
74: #define isinf(d) (isnan(d - d) && !isnan(d))
75: #endif
76: #ifndef isnan
77: #define isnan(d) (d != d)
78: #endif
80: #ifndef NAN
81: #ifdef _WIN32
82: #define NAN sqrt(-1.0)
83: #else
84: #define NAN 0.0 / 0.0
85: #endif
86: #endif
88: typedef struct {
89: const unsigned char *json;
90: size_t position;
91: } error;
92: static error global_error = {NULL, 0};
94: CJSON_PUBLIC(const char *) cJSON_GetErrorPtr(void)
95: {
96: return (const char *)(global_error.json + global_error.position);
97: }
99: CJSON_PUBLIC(char *) cJSON_GetStringValue(const cJSON *const item)
100: {
101: if (!cJSON_IsString(item)) return NULL;
103: return item->valuestring;
104: }
106: CJSON_PUBLIC(double) cJSON_GetNumberValue(const cJSON *const item)
107: {
108: if (!cJSON_IsNumber(item)) return (double)NAN;
110: return item->valuedouble;
111: }
113: /* This is a safeguard to prevent copy-pasters from using incompatible C and header files */
114: #if (CJSON_VERSION_MAJOR != 1) || (CJSON_VERSION_MINOR != 7) || (CJSON_VERSION_PATCH != 15)
115: #error cJSON.h and cJSON.c have different versions. Make sure that both have the same.
116: #endif
118: CJSON_PUBLIC(const char *) cJSON_Version(void)
119: {
120: static char version[15];
121: snprintf(version, sizeof(version) / sizeof(version[0]), "%i.%i.%i", CJSON_VERSION_MAJOR, CJSON_VERSION_MINOR, CJSON_VERSION_PATCH);
123: return version;
124: }
126: /* Case insensitive string comparison, doesn't consider two NULL pointers equal though */
127: static int case_insensitive_strcmp(const unsigned char *string1, const unsigned char *string2)
128: {
129: if ((string1 == NULL) || (string2 == NULL)) return 1;
131: if (string1 == string2) return 0;
133: for (; tolower(*string1) == tolower(*string2); (void)string1++, string2++) {
134: if (*string1 == '\0') return 0;
135: }
137: return tolower(*string1) - tolower(*string2);
138: }
140: typedef struct internal_hooks {
141: void *(CJSON_CDECL *allocate)(size_t size);
142: void(CJSON_CDECL *deallocate)(void *pointer);
143: void *(CJSON_CDECL *reallocate)(void *pointer, size_t size);
144: } internal_hooks;
146: #if defined(_MSC_VER)
147: /* work around MSVC error C2322: '...' address of dllimport '...' is not static */
148: static void *CJSON_CDECL internal_malloc(size_t size)
149: {
150: return malloc(size);
151: }
152: static void CJSON_CDECL internal_free(void *pointer)
153: {
154: free(pointer);
155: }
156: static void *CJSON_CDECL internal_realloc(void *pointer, size_t size)
157: {
158: return realloc(pointer, size);
159: }
160: #else
161: #define internal_malloc malloc
162: #define internal_free free
163: #define internal_realloc realloc
164: #endif
166: /* strlen of character literals resolved at compile time */
167: #define static_strlen(string_literal) (sizeof(string_literal) - sizeof(""))
169: static internal_hooks global_hooks = {internal_malloc, internal_free, internal_realloc};
171: static unsigned char *cJSON_strdup(const unsigned char *string, const internal_hooks *const hooks)
172: {
173: size_t length = 0;
174: unsigned char *copy = NULL;
176: if (string == NULL) return NULL;
178: length = strlen((const char *)string) + sizeof("");
179: copy = (unsigned char *)hooks->allocate(length);
180: if (copy == NULL) return NULL;
181: memcpy(copy, string, length);
183: return copy;
184: }
186: CJSON_PUBLIC(void) cJSON_InitHooks(cJSON_Hooks *hooks)
187: {
188: if (hooks == NULL) {
189: /* Reset hooks */
190: global_hooks.allocate = malloc;
191: global_hooks.deallocate = free;
192: global_hooks.reallocate = realloc;
193: return;
194: }
196: global_hooks.allocate = malloc;
197: if (hooks->malloc_fn != NULL) global_hooks.allocate = hooks->malloc_fn;
199: global_hooks.deallocate = free;
200: if (hooks->free_fn != NULL) global_hooks.deallocate = hooks->free_fn;
202: /* use realloc only if both free and malloc are used */
203: global_hooks.reallocate = NULL;
204: if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free)) global_hooks.reallocate = realloc;
205: }
207: /* Internal constructor. */
208: static cJSON *cJSON_New_Item(const internal_hooks *const hooks)
209: {
210: cJSON *node = (cJSON *)hooks->allocate(sizeof(cJSON));
211: if (node) memset(node, '\0', sizeof(cJSON));
213: return node;
214: }
216: /* Delete a cJSON structure. */
217: CJSON_PUBLIC(void) cJSON_Delete(cJSON *item)
218: {
219: cJSON *next = NULL;
220: while (item != NULL) {
221: next = item->next;
222: if (!(item->type & cJSON_IsReference) && (item->child != NULL)) cJSON_Delete(item->child);
223: if (!(item->type & cJSON_IsReference) && (item->valuestring != NULL)) global_hooks.deallocate(item->valuestring);
224: if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) global_hooks.deallocate(item->string);
225: global_hooks.deallocate(item);
226: item = next;
227: }
228: }
230: /* get the decimal point character of the current locale */
231: static unsigned char get_decimal_point(void)
232: {
233: #ifdef ENABLE_LOCALES
234: struct lconv *lconv = localeconv();
235: return (unsigned char)lconv->decimal_point[0];
236: #else
237: return '.';
238: #endif
239: }
241: typedef struct {
242: const unsigned char *content;
243: size_t length;
244: size_t offset;
245: size_t depth; /* How deeply nested (in arrays/objects) is the input at the current offset. */
246: internal_hooks hooks;
247: } parse_buffer;
249: /* check if the given size is left to read in a given parse buffer (starting with 1) */
250: #define can_read(buffer, size) ((buffer != NULL) && (((buffer)->offset + size) <= (buffer)->length))
251: /* check if the buffer can be accessed at the given index (starting with 0) */
252: #define can_access_at_index(buffer, index) ((buffer != NULL) && (((buffer)->offset + index) < (buffer)->length))
253: #define cannot_access_at_index(buffer, index) (!can_access_at_index(buffer, index))
254: /* get a pointer to the buffer at the position */
255: #define buffer_at_offset(buffer) ((buffer)->content + (buffer)->offset)
257: /* Parse the input text to generate a number, and populate the result into item. */
258: static cJSON_bool parse_number(cJSON *const item, parse_buffer *const input_buffer)
259: {
260: double number = 0;
261: unsigned char *after_end = NULL;
262: unsigned char number_c_string[64];
263: unsigned char decimal_point = get_decimal_point();
264: size_t i = 0;
266: if ((input_buffer == NULL) || (input_buffer->content == NULL)) return false;
268: /* copy the number into a temporary buffer and replace '.' with the decimal point
269: * of the current locale (for strtod)
270: * This also takes care of '\0' not necessarily being available for marking the end of the input */
271: for (i = 0; (i < (sizeof(number_c_string) - 1)) && can_access_at_index(input_buffer, i); i++) {
272: switch (buffer_at_offset(input_buffer)[i]) {
273: case '0':
274: case '1':
275: case '2':
276: case '3':
277: case '4':
278: case '5':
279: case '6':
280: case '7':
281: case '8':
282: case '9':
283: case '+':
284: case '-':
285: case 'e':
286: case 'E':
287: number_c_string[i] = buffer_at_offset(input_buffer)[i];
288: break;
290: case '.':
291: number_c_string[i] = decimal_point;
292: break;
294: default:
295: goto loop_end;
296: }
297: }
298: loop_end:
299: number_c_string[i] = '\0';
301: number = strtod((const char *)number_c_string, (char **)&after_end);
302: if (number_c_string == after_end) return false; /* parse_error */
304: item->valuedouble = number;
306: /* use saturation in case of overflow */
307: if (number >= INT_MAX) {
308: item->valueint = INT_MAX;
309: } else if (number <= (double)INT_MIN) {
310: item->valueint = INT_MIN;
311: } else {
312: item->valueint = (int)number;
313: }
315: item->type = cJSON_Number;
317: input_buffer->offset += (size_t)(after_end - number_c_string);
318: return true;
319: }
321: /* don't ask me, but the original cJSON_SetNumberValue returns an integer or double */
322: CJSON_PUBLIC(double) cJSON_SetNumberHelper(cJSON *object, double number)
323: {
324: if (number >= INT_MAX) {
325: object->valueint = INT_MAX;
326: } else if (number <= (double)INT_MIN) {
327: object->valueint = INT_MIN;
328: } else {
329: object->valueint = (int)number;
330: }
332: return object->valuedouble = number;
333: }
335: CJSON_PUBLIC(char *) cJSON_SetValuestring(cJSON *object, const char *valuestring)
336: {
337: char *copy = NULL;
338: /* if object's type is not cJSON_String or is cJSON_IsReference, it should not set valuestring */
339: if (!(object->type & cJSON_String) || (object->type & cJSON_IsReference)) return NULL;
340: if (strlen(valuestring) <= strlen(object->valuestring)) {
341: strcpy(object->valuestring, valuestring);
342: return object->valuestring;
343: }
344: copy = (char *)cJSON_strdup((const unsigned char *)valuestring, &global_hooks);
345: if (copy == NULL) return NULL;
346: if (object->valuestring != NULL) cJSON_free(object->valuestring);
347: object->valuestring = copy;
349: return copy;
350: }
352: typedef struct {
353: unsigned char *buffer;
354: size_t length;
355: size_t offset;
356: size_t depth; /* current nesting depth (for formatted printing) */
357: cJSON_bool noalloc;
358: cJSON_bool format; /* is this print a formatted print */
359: internal_hooks hooks;
360: } printbuffer;
362: /* realloc printbuffer if necessary to have at least "needed" bytes more */
363: static unsigned char *ensure(printbuffer *const p, size_t needed)
364: {
365: unsigned char *newbuffer = NULL;
366: size_t newsize = 0;
368: if ((p == NULL) || (p->buffer == NULL)) return NULL;
370: if ((p->length > 0) && (p->offset >= p->length)) {
371: /* make sure that offset is valid */
372: return NULL;
373: }
375: if (needed > INT_MAX) {
376: /* sizes bigger than INT_MAX are currently not supported */
377: return NULL;
378: }
380: needed += p->offset + 1;
381: if (needed <= p->length) return p->buffer + p->offset;
383: if (p->noalloc) return NULL;
385: /* calculate new buffer size */
386: if (needed > (INT_MAX / 2)) {
387: /* overflow of int, use INT_MAX if possible */
388: if (needed <= INT_MAX) {
389: newsize = INT_MAX;
390: } else {
391: return NULL;
392: }
393: } else {
394: newsize = needed * 2;
395: }
397: if (p->hooks.reallocate != NULL) {
398: /* reallocate with realloc if available */
399: newbuffer = (unsigned char *)p->hooks.reallocate(p->buffer, newsize);
400: if (newbuffer == NULL) {
401: p->hooks.deallocate(p->buffer);
402: p->length = 0;
403: p->buffer = NULL;
405: return NULL;
406: }
407: } else {
408: /* otherwise reallocate manually */
409: newbuffer = (unsigned char *)p->hooks.allocate(newsize);
410: if (!newbuffer) {
411: p->hooks.deallocate(p->buffer);
412: p->length = 0;
413: p->buffer = NULL;
415: return NULL;
416: }
418: memcpy(newbuffer, p->buffer, p->offset + 1);
419: p->hooks.deallocate(p->buffer);
420: }
421: p->length = newsize;
422: p->buffer = newbuffer;
424: return newbuffer + p->offset;
425: }
427: /* calculate the new length of the string in a printbuffer and update the offset */
428: static void update_offset(printbuffer *const buffer)
429: {
430: const unsigned char *buffer_pointer = NULL;
431: if ((buffer == NULL) || (buffer->buffer == NULL)) return;
432: buffer_pointer = buffer->buffer + buffer->offset;
434: buffer->offset += strlen((const char *)buffer_pointer);
435: }
437: /* securely comparison of floating-point variables */
438: static cJSON_bool compare_double(double a, double b)
439: {
440: double maxVal = fabs(a) > fabs(b) ? fabs(a) : fabs(b);
441: return fabs(a - b) <= maxVal * DBL_EPSILON;
442: }
444: /* Render the number nicely from the given item into a string. */
445: static cJSON_bool print_number(const cJSON *const item, printbuffer *const output_buffer)
446: {
447: unsigned char *output_pointer = NULL;
448: double d = item->valuedouble;
449: int length = 0;
450: size_t i = 0;
451: unsigned char number_buffer[26] = {0}; /* temporary buffer to print the number into */
452: unsigned char decimal_point = get_decimal_point();
453: double test = 0.0;
455: if (output_buffer == NULL) return false;
457: /* This checks for NaN and Infinity */
458: if (isnan(d) || isinf(d)) {
459: length = snprintf((char *)number_buffer, sizeof(number_buffer) / sizeof(number_buffer[0]), "null");
460: } else if (d == (double)item->valueint) {
461: length = snprintf((char *)number_buffer, sizeof(number_buffer) / sizeof(number_buffer[0]), "%d", item->valueint);
462: } else {
463: /* Try 15 decimal places of precision to avoid insignificant nonzero digits */
464: length = snprintf((char *)number_buffer, sizeof(number_buffer) / sizeof(number_buffer[0]), "%1.15g", d);
466: /* Check whether the original double can be recovered */
467: if ((sscanf((char *)number_buffer, "%lg", &test) != 1) || !compare_double((double)test, d)) {
468: /* If not, print with 17 decimal places of precision */
469: length = snprintf((char *)number_buffer, sizeof(number_buffer) / sizeof(number_buffer[0]), "%1.17g", d);
470: }
471: }
473: /* snprintf failed or buffer overrun occurred */
474: if ((length < 0) || (length > (int)(sizeof(number_buffer) - 1))) return false;
476: /* reserve appropriate space in the output */
477: output_pointer = ensure(output_buffer, (size_t)length + sizeof(""));
478: if (output_pointer == NULL) return false;
480: /* copy the printed number to the output and replace locale
481: * dependent decimal point with '.' */
482: for (i = 0; i < ((size_t)length); i++) {
483: if (number_buffer[i] == decimal_point) {
484: output_pointer[i] = '.';
485: continue;
486: }
488: output_pointer[i] = number_buffer[i];
489: }
490: output_pointer[i] = '\0';
492: output_buffer->offset += (size_t)length;
494: return true;
495: }
497: /* parse 4 digit hexadecimal number */
498: static unsigned parse_hex4(const unsigned char *const input)
499: {
500: unsigned int h = 0;
501: size_t i = 0;
503: for (i = 0; i < 4; i++) {
504: /* parse digit */
505: if ((input[i] >= '0') && (input[i] <= '9')) {
506: h += (unsigned int)input[i] - '0';
507: } else if ((input[i] >= 'A') && (input[i] <= 'F')) {
508: h += (unsigned int)10 + input[i] - 'A';
509: } else if ((input[i] >= 'a') && (input[i] <= 'f')) {
510: h += (unsigned int)10 + input[i] - 'a';
511: } else /* invalid */
512: {
513: return 0;
514: }
516: if (i < 3) {
517: /* shift left to make place for the next nibble */
518: h = h << 4;
519: }
520: }
522: return h;
523: }
525: /* converts a UTF-16 literal to UTF-8
526: * A literal can be one or two sequences of the form \uXXXX */
527: static unsigned char utf16_literal_to_utf8(const unsigned char *const input_pointer, const unsigned char *const input_end, unsigned char **output_pointer)
528: {
529: long unsigned int codepoint = 0;
530: unsigned int first_code = 0;
531: const unsigned char *first_sequence = input_pointer;
532: unsigned char utf8_length = 0;
533: unsigned char utf8_position = 0;
534: unsigned char sequence_length = 0;
535: unsigned char first_byte_mark = 0;
537: if ((input_end - first_sequence) < 6) {
538: /* input ends unexpectedly */
539: goto fail;
540: }
542: /* get the first utf16 sequence */
543: first_code = parse_hex4(first_sequence + 2);
545: /* check that the code is valid */
546: if ((first_code >= 0xDC00) && (first_code <= 0xDFFF)) goto fail;
548: /* UTF16 surrogate pair */
549: if ((first_code >= 0xD800) && (first_code <= 0xDBFF)) {
550: const unsigned char *second_sequence = first_sequence + 6;
551: unsigned int second_code = 0;
552: sequence_length = 12; /* \uXXXX\uXXXX */
554: if ((input_end - second_sequence) < 6) {
555: /* input ends unexpectedly */
556: goto fail;
557: }
559: if ((second_sequence[0] != '\\') || (second_sequence[1] != 'u')) {
560: /* missing second half of the surrogate pair */
561: goto fail;
562: }
564: /* get the second utf16 sequence */
565: second_code = parse_hex4(second_sequence + 2);
566: /* check that the code is valid */
567: if ((second_code < 0xDC00) || (second_code > 0xDFFF)) {
568: /* invalid second half of the surrogate pair */
569: goto fail;
570: }
572: /* calculate the unicode codepoint from the surrogate pair */
573: codepoint = 0x10000 + (((first_code & 0x3FF) << 10) | (second_code & 0x3FF));
574: } else {
575: sequence_length = 6; /* \uXXXX */
576: codepoint = first_code;
577: }
579: /* encode as UTF-8
580: * takes at maximum 4 bytes to encode:
581: * 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
582: if (codepoint < 0x80) {
583: /* normal ascii, encoding 0xxxxxxx */
584: utf8_length = 1;
585: } else if (codepoint < 0x800) {
586: /* two bytes, encoding 110xxxxx 10xxxxxx */
587: utf8_length = 2;
588: first_byte_mark = 0xC0; /* 11000000 */
589: } else if (codepoint < 0x10000) {
590: /* three bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx */
591: utf8_length = 3;
592: first_byte_mark = 0xE0; /* 11100000 */
593: } else if (codepoint <= 0x10FFFF) {
594: /* four bytes, encoding 1110xxxx 10xxxxxx 10xxxxxx 10xxxxxx */
595: utf8_length = 4;
596: first_byte_mark = 0xF0; /* 11110000 */
597: } else {
598: /* invalid unicode codepoint */
599: goto fail;
600: }
602: /* encode as utf8 */
603: for (utf8_position = (unsigned char)(utf8_length - 1); utf8_position > 0; utf8_position--) {
604: /* 10xxxxxx */
605: (*output_pointer)[utf8_position] = (unsigned char)((codepoint | 0x80) & 0xBF);
606: codepoint >>= 6;
607: }
608: /* encode first byte */
609: if (utf8_length > 1) {
610: (*output_pointer)[0] = (unsigned char)((codepoint | first_byte_mark) & 0xFF);
611: } else {
612: (*output_pointer)[0] = (unsigned char)(codepoint & 0x7F);
613: }
615: *output_pointer += utf8_length;
617: return sequence_length;
619: fail:
620: return 0;
621: }
623: /* Parse the input text into an unescaped cinput, and populate item. */
624: static cJSON_bool parse_string(cJSON *const item, parse_buffer *const input_buffer)
625: {
626: const unsigned char *input_pointer = buffer_at_offset(input_buffer) + 1;
627: const unsigned char *input_end = buffer_at_offset(input_buffer) + 1;
628: unsigned char *output_pointer = NULL;
629: unsigned char *output = NULL;
631: /* not a string */
632: if (buffer_at_offset(input_buffer)[0] != '\"') goto fail;
634: {
635: /* calculate approximate size of the output (overestimate) */
636: size_t allocation_length = 0;
637: size_t skipped_bytes = 0;
638: while (((size_t)(input_end - input_buffer->content) < input_buffer->length) && (*input_end != '\"')) {
639: /* is escape sequence */
640: if (input_end[0] == '\\') {
641: if ((size_t)(input_end + 1 - input_buffer->content) >= input_buffer->length) {
642: /* prevent buffer overflow when last input character is a backslash */
643: goto fail;
644: }
645: skipped_bytes++;
646: input_end++;
647: }
648: input_end++;
649: }
650: if (((size_t)(input_end - input_buffer->content) >= input_buffer->length) || (*input_end != '\"')) goto fail; /* string ended unexpectedly */
652: /* This is at most how much we need for the output */
653: allocation_length = (size_t)(input_end - buffer_at_offset(input_buffer)) - skipped_bytes;
654: output = (unsigned char *)input_buffer->hooks.allocate(allocation_length + sizeof(""));
655: if (output == NULL) goto fail; /* allocation failure */
656: }
658: output_pointer = output;
659: /* loop through the string literal */
660: while (input_pointer < input_end) {
661: if (*input_pointer != '\\') *output_pointer++ = *input_pointer++;
662: /* escape sequence */
663: else {
664: unsigned char sequence_length = 2;
665: if ((input_end - input_pointer) < 1) goto fail;
667: switch (input_pointer[1]) {
668: case 'b':
669: *output_pointer++ = '\b';
670: break;
671: case 'f':
672: *output_pointer++ = '\f';
673: break;
674: case 'n':
675: *output_pointer++ = '\n';
676: break;
677: case 'r':
678: *output_pointer++ = '\r';
679: break;
680: case 't':
681: *output_pointer++ = '\t';
682: break;
683: case '\"':
684: case '\\':
685: case '/':
686: *output_pointer++ = input_pointer[1];
687: break;
689: /* UTF-16 literal */
690: case 'u':
691: sequence_length = utf16_literal_to_utf8(input_pointer, input_end, &output_pointer);
692: if (sequence_length == 0) {
693: /* failed to convert UTF16-literal to UTF-8 */
694: goto fail;
695: }
696: break;
698: default:
699: goto fail;
700: }
701: input_pointer += sequence_length;
702: }
703: }
705: /* zero terminate the output */
706: *output_pointer = '\0';
708: item->type = cJSON_String;
709: item->valuestring = (char *)output;
711: input_buffer->offset = (size_t)(input_end - input_buffer->content);
712: input_buffer->offset++;
714: return true;
716: fail:
717: if (output != NULL) input_buffer->hooks.deallocate(output);
719: if (input_pointer != NULL) input_buffer->offset = (size_t)(input_pointer - input_buffer->content);
721: return false;
722: }
724: /* Render the cstring provided to an escaped version that can be printed. */
725: static cJSON_bool print_string_ptr(const unsigned char *const input, printbuffer *const output_buffer)
726: {
727: const unsigned char *input_pointer = NULL;
728: unsigned char *output = NULL;
729: unsigned char *output_pointer = NULL;
730: size_t output_length = 0;
731: /* numbers of additional characters needed for escaping */
732: size_t escape_characters = 0;
734: if (output_buffer == NULL) return false;
736: /* empty string */
737: if (input == NULL) {
738: output = ensure(output_buffer, sizeof("\"\""));
739: if (output == NULL) return false;
740: strcpy((char *)output, "\"\"");
742: return true;
743: }
745: /* set "flag" to 1 if something needs to be escaped */
746: for (input_pointer = input; *input_pointer; input_pointer++) {
747: switch (*input_pointer) {
748: case '\"':
749: case '\\':
750: case '\b':
751: case '\f':
752: case '\n':
753: case '\r':
754: case '\t':
755: /* one character escape sequence */
756: escape_characters++;
757: break;
758: default:
759: if (*input_pointer < 32) {
760: /* UTF-16 escape sequence uXXXX */
761: escape_characters += 5;
762: }
763: break;
764: }
765: }
766: output_length = (size_t)(input_pointer - input) + escape_characters;
768: output = ensure(output_buffer, output_length + sizeof("\"\""));
769: if (output == NULL) return false;
771: /* no characters have to be escaped */
772: if (escape_characters == 0) {
773: output[0] = '\"';
774: memcpy(output + 1, input, output_length);
775: output[output_length + 1] = '\"';
776: output[output_length + 2] = '\0';
778: return true;
779: }
781: output[0] = '\"';
782: output_pointer = output + 1;
783: /* copy the string */
784: for (input_pointer = input; *input_pointer != '\0'; (void)input_pointer++, output_pointer++) {
785: if ((*input_pointer > 31) && (*input_pointer != '\"') && (*input_pointer != '\\')) {
786: /* normal character, copy */
787: *output_pointer = *input_pointer;
788: } else {
789: /* character needs to be escaped */
790: *output_pointer++ = '\\';
791: switch (*input_pointer) {
792: case '\\':
793: *output_pointer = '\\';
794: break;
795: case '\"':
796: *output_pointer = '\"';
797: break;
798: case '\b':
799: *output_pointer = 'b';
800: break;
801: case '\f':
802: *output_pointer = 'f';
803: break;
804: case '\n':
805: *output_pointer = 'n';
806: break;
807: case '\r':
808: *output_pointer = 'r';
809: break;
810: case '\t':
811: *output_pointer = 't';
812: break;
813: default:
814: /* escape and print as unicode codepoint */
815: snprintf((char *)output_pointer, 6, "u%04x", *input_pointer);
816: output_pointer += 5;
817: break;
818: }
819: }
820: }
821: output[output_length + 1] = '\"';
822: output[output_length + 2] = '\0';
824: return true;
825: }
827: /* Invoke print_string_ptr (which is useful) on an item. */
828: static cJSON_bool print_string(const cJSON *const item, printbuffer *const p)
829: {
830: return print_string_ptr((unsigned char *)item->valuestring, p);
831: }
833: /* Predeclare these prototypes. */
834: static cJSON_bool parse_value(cJSON *const item, parse_buffer *const input_buffer);
835: static cJSON_bool print_value(const cJSON *const item, printbuffer *const output_buffer);
836: static cJSON_bool parse_array(cJSON *const item, parse_buffer *const input_buffer);
837: static cJSON_bool print_array(const cJSON *const item, printbuffer *const output_buffer);
838: static cJSON_bool parse_object(cJSON *const item, parse_buffer *const input_buffer);
839: static cJSON_bool print_object(const cJSON *const item, printbuffer *const output_buffer);
841: /* Utility to jump whitespace and cr/lf */
842: static parse_buffer *buffer_skip_whitespace(parse_buffer *const buffer)
843: {
844: if ((buffer == NULL) || (buffer->content == NULL)) return NULL;
846: if (cannot_access_at_index(buffer, 0)) return buffer;
848: while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32)) buffer->offset++;
850: if (buffer->offset == buffer->length) buffer->offset--;
852: return buffer;
853: }
855: /* skip the UTF-8 BOM (byte order mark) if it is at the beginning of a buffer */
856: static parse_buffer *skip_utf8_bom(parse_buffer *const buffer)
857: {
858: if ((buffer == NULL) || (buffer->content == NULL) || (buffer->offset != 0)) return NULL;
860: if (can_access_at_index(buffer, 4) && (strncmp((const char *)buffer_at_offset(buffer), "\xEF\xBB\xBF", 3) == 0)) buffer->offset += 3;
862: return buffer;
863: }
865: CJSON_PUBLIC(cJSON *) cJSON_ParseWithOpts(const char *value, const char **return_parse_end, cJSON_bool require_null_terminated)
866: {
867: size_t buffer_length;
869: if (NULL == value) return NULL;
871: /* Adding null character size due to require_null_terminated. */
872: buffer_length = strlen(value) + sizeof("");
874: return cJSON_ParseWithLengthOpts(value, buffer_length, return_parse_end, require_null_terminated);
875: }
877: /* Parse an object - create a new root, and populate. */
878: CJSON_PUBLIC(cJSON *) cJSON_ParseWithLengthOpts(const char *value, size_t buffer_length, const char **return_parse_end, cJSON_bool require_null_terminated)
879: {
880: parse_buffer buffer = {
881: 0, 0, 0, 0, {0, 0, 0}
882: };
883: cJSON *item = NULL;
885: /* reset error position */
886: global_error.json = NULL;
887: global_error.position = 0;
889: if (value == NULL || 0 == buffer_length) goto fail;
891: buffer.content = (const unsigned char *)value;
892: buffer.length = buffer_length;
893: buffer.offset = 0;
894: buffer.hooks = global_hooks;
896: item = cJSON_New_Item(&global_hooks);
897: if (item == NULL) /* memory fail */
898: {
899: goto fail;
900: }
902: if (!parse_value(item, buffer_skip_whitespace(skip_utf8_bom(&buffer)))) {
903: /* parse failure. ep is set. */
904: goto fail;
905: }
907: /* if we require null-terminated JSON without appended garbage, skip and then check for a null terminator */
908: if (require_null_terminated) {
909: buffer_skip_whitespace(&buffer);
910: if ((buffer.offset >= buffer.length) || buffer_at_offset(&buffer)[0] != '\0') goto fail;
911: }
912: if (return_parse_end) *return_parse_end = (const char *)buffer_at_offset(&buffer);
914: return item;
916: fail:
917: if (item != NULL) cJSON_Delete(item);
919: if (value != NULL) {
920: error local_error;
921: local_error.json = (const unsigned char *)value;
922: local_error.position = 0;
924: if (buffer.offset < buffer.length) {
925: local_error.position = buffer.offset;
926: } else if (buffer.length > 0) {
927: local_error.position = buffer.length - 1;
928: }
930: if (return_parse_end != NULL) *return_parse_end = (const char *)local_error.json + local_error.position;
932: global_error = local_error;
933: }
935: return NULL;
936: }
938: /* Default options for cJSON_Parse */
939: CJSON_PUBLIC(cJSON *) cJSON_Parse(const char *value)
940: {
941: return cJSON_ParseWithOpts(value, 0, 0);
942: }
944: CJSON_PUBLIC(cJSON *) cJSON_ParseWithLength(const char *value, size_t buffer_length)
945: {
946: return cJSON_ParseWithLengthOpts(value, buffer_length, 0, 0);
947: }
949: #define cjson_min(a, b) (((a) < (b)) ? (a) : (b))
951: static unsigned char *print(const cJSON *const item, cJSON_bool format, const internal_hooks *const hooks)
952: {
953: static const size_t default_buffer_size = 256;
954: printbuffer buffer[1];
955: unsigned char *printed = NULL;
957: memset(buffer, 0, sizeof(buffer));
959: /* create buffer */
960: buffer->buffer = (unsigned char *)hooks->allocate(default_buffer_size);
961: buffer->length = default_buffer_size;
962: buffer->format = format;
963: buffer->hooks = *hooks;
964: if (buffer->buffer == NULL) goto fail;
966: /* print the value */
967: if (!print_value(item, buffer)) goto fail;
968: update_offset(buffer);
970: /* check if reallocate is available */
971: if (hooks->reallocate != NULL) {
972: printed = (unsigned char *)hooks->reallocate(buffer->buffer, buffer->offset + 1);
973: if (printed == NULL) goto fail;
974: buffer->buffer = NULL;
975: } else /* otherwise copy the JSON over to a new buffer */
976: {
977: printed = (unsigned char *)hooks->allocate(buffer->offset + 1);
978: if (printed == NULL) goto fail;
979: memcpy(printed, buffer->buffer, cjson_min(buffer->length, buffer->offset + 1));
980: printed[buffer->offset] = '\0'; /* just to be sure */
982: /* free the buffer */
983: hooks->deallocate(buffer->buffer);
984: }
986: return printed;
988: fail:
989: if (buffer->buffer != NULL) hooks->deallocate(buffer->buffer);
991: if (printed != NULL) hooks->deallocate(printed);
993: return NULL;
994: }
996: /* Render a cJSON item/entity/structure to text. */
997: CJSON_PUBLIC(char *) cJSON_Print(const cJSON *item)
998: {
999: return (char *)print(item, true, &global_hooks);
1000: }
1002: CJSON_PUBLIC(char *) cJSON_PrintUnformatted(const cJSON *item)
1003: {
1004: return (char *)print(item, false, &global_hooks);
1005: }
1007: CJSON_PUBLIC(char *) cJSON_PrintBuffered(const cJSON *item, int prebuffer, cJSON_bool fmt)
1008: {
1009: printbuffer p = {
1010: 0, 0, 0, 0, 0, 0, {0, 0, 0}
1011: };
1013: if (prebuffer < 0) return NULL;
1015: p.buffer = (unsigned char *)global_hooks.allocate((size_t)prebuffer);
1016: if (!p.buffer) return NULL;
1018: p.length = (size_t)prebuffer;
1019: p.offset = 0;
1020: p.noalloc = false;
1021: p.format = fmt;
1022: p.hooks = global_hooks;
1024: if (!print_value(item, &p)) {
1025: global_hooks.deallocate(p.buffer);
1026: return NULL;
1027: }
1029: return (char *)p.buffer;
1030: }
1032: CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buffer, const int length, const cJSON_bool format)
1033: {
1034: printbuffer p = {
1035: 0, 0, 0, 0, 0, 0, {0, 0, 0}
1036: };
1038: if ((length < 0) || (buffer == NULL)) return false;
1040: p.buffer = (unsigned char *)buffer;
1041: p.length = (size_t)length;
1042: p.offset = 0;
1043: p.noalloc = true;
1044: p.format = format;
1045: p.hooks = global_hooks;
1047: return print_value(item, &p);
1048: }
1050: /* Parser core - when encountering text, process appropriately. */
1051: static cJSON_bool parse_value(cJSON *const item, parse_buffer *const input_buffer)
1052: {
1053: if ((input_buffer == NULL) || (input_buffer->content == NULL)) return false; /* no input */
1055: /* parse the different types of values */
1056: /* null */
1057: if (can_read(input_buffer, 4) && (strncmp((const char *)buffer_at_offset(input_buffer), "null", 4) == 0)) {
1058: item->type = cJSON_NULL;
1059: input_buffer->offset += 4;
1060: return true;
1061: }
1062: /* false */
1063: if (can_read(input_buffer, 5) && (strncmp((const char *)buffer_at_offset(input_buffer), "false", 5) == 0)) {
1064: item->type = cJSON_False;
1065: input_buffer->offset += 5;
1066: return true;
1067: }
1068: /* true */
1069: if (can_read(input_buffer, 4) && (strncmp((const char *)buffer_at_offset(input_buffer), "true", 4) == 0)) {
1070: item->type = cJSON_True;
1071: item->valueint = 1;
1072: input_buffer->offset += 4;
1073: return true;
1074: }
1075: /* string */
1076: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '\"')) return parse_string(item, input_buffer);
1077: /* number */
1078: if (can_access_at_index(input_buffer, 0) && ((buffer_at_offset(input_buffer)[0] == '-') || ((buffer_at_offset(input_buffer)[0] >= '0') && (buffer_at_offset(input_buffer)[0] <= '9')))) return parse_number(item, input_buffer);
1079: /* array */
1080: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '[')) return parse_array(item, input_buffer);
1081: /* object */
1082: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '{')) return parse_object(item, input_buffer);
1084: return false;
1085: }
1087: /* Render a value to text. */
1088: static cJSON_bool print_value(const cJSON *const item, printbuffer *const output_buffer)
1089: {
1090: unsigned char *output = NULL;
1092: if ((item == NULL) || (output_buffer == NULL)) return false;
1094: switch (item->type & 0xFF) {
1095: case cJSON_NULL:
1096: output = ensure(output_buffer, 5);
1097: if (output == NULL) return false;
1098: strcpy((char *)output, "null");
1099: return true;
1101: case cJSON_False:
1102: output = ensure(output_buffer, 6);
1103: if (output == NULL) return false;
1104: strcpy((char *)output, "false");
1105: return true;
1107: case cJSON_True:
1108: output = ensure(output_buffer, 5);
1109: if (output == NULL) return false;
1110: strcpy((char *)output, "true");
1111: return true;
1113: case cJSON_Number:
1114: return print_number(item, output_buffer);
1116: case cJSON_Raw: {
1117: size_t raw_length = 0;
1118: if (item->valuestring == NULL) return false;
1120: raw_length = strlen(item->valuestring) + sizeof("");
1121: output = ensure(output_buffer, raw_length);
1122: if (output == NULL) return false;
1123: memcpy(output, item->valuestring, raw_length);
1124: return true;
1125: }
1127: case cJSON_String:
1128: return print_string(item, output_buffer);
1130: case cJSON_Array:
1131: return print_array(item, output_buffer);
1133: case cJSON_Object:
1134: return print_object(item, output_buffer);
1136: default:
1137: return false;
1138: }
1139: }
1141: /* Build an array from input text. */
1142: static cJSON_bool parse_array(cJSON *const item, parse_buffer *const input_buffer)
1143: {
1144: cJSON *head = NULL; /* head of the linked list */
1145: cJSON *current_item = NULL;
1147: if (input_buffer->depth >= CJSON_NESTING_LIMIT) return false; /* to deeply nested */
1148: input_buffer->depth++;
1150: if (buffer_at_offset(input_buffer)[0] != '[') {
1151: /* not an array */
1152: goto fail;
1153: }
1155: input_buffer->offset++;
1156: buffer_skip_whitespace(input_buffer);
1157: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ']')) {
1158: /* empty array */
1159: goto success;
1160: }
1162: /* check if we skipped to the end of the buffer */
1163: if (cannot_access_at_index(input_buffer, 0)) {
1164: input_buffer->offset--;
1165: goto fail;
1166: }
1168: /* step back to character in front of the first element */
1169: input_buffer->offset--;
1170: /* loop through the comma separated array elements */
1171: do {
1172: /* allocate next item */
1173: cJSON *new_item = cJSON_New_Item(&input_buffer->hooks);
1174: if (new_item == NULL) goto fail; /* allocation failure */
1176: /* attach next item to list */
1177: if (head == NULL) {
1178: /* start the linked list */
1179: current_item = head = new_item;
1180: } else {
1181: /* add to the end and advance */
1182: current_item->next = new_item;
1183: new_item->prev = current_item;
1184: current_item = new_item;
1185: }
1187: /* parse next value */
1188: input_buffer->offset++;
1189: buffer_skip_whitespace(input_buffer);
1190: if (!parse_value(current_item, input_buffer)) goto fail; /* failed to parse value */
1191: buffer_skip_whitespace(input_buffer);
1192: } while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1194: if (cannot_access_at_index(input_buffer, 0) || buffer_at_offset(input_buffer)[0] != ']') goto fail; /* expected end of array */
1196: success:
1197: input_buffer->depth--;
1199: if (head != NULL) head->prev = current_item;
1201: item->type = cJSON_Array;
1202: item->child = head;
1204: input_buffer->offset++;
1206: return true;
1208: fail:
1209: if (head != NULL) cJSON_Delete(head);
1211: return false;
1212: }
1214: /* Render an array to text */
1215: static cJSON_bool print_array(const cJSON *const item, printbuffer *const output_buffer)
1216: {
1217: unsigned char *output_pointer = NULL;
1218: size_t length = 0;
1219: cJSON *current_element = item->child;
1221: if (output_buffer == NULL) return false;
1223: /* Compose the output array. */
1224: /* opening square bracket */
1225: output_pointer = ensure(output_buffer, 1);
1226: if (output_pointer == NULL) return false;
1228: *output_pointer = '[';
1229: output_buffer->offset++;
1230: output_buffer->depth++;
1232: while (current_element != NULL) {
1233: if (!print_value(current_element, output_buffer)) return false;
1234: update_offset(output_buffer);
1235: if (current_element->next) {
1236: length = (size_t)(output_buffer->format ? 2 : 1);
1237: output_pointer = ensure(output_buffer, length + 1);
1238: if (output_pointer == NULL) return false;
1239: *output_pointer++ = ',';
1240: if (output_buffer->format) *output_pointer++ = ' ';
1241: *output_pointer = '\0';
1242: output_buffer->offset += length;
1243: }
1244: current_element = current_element->next;
1245: }
1247: output_pointer = ensure(output_buffer, 2);
1248: if (output_pointer == NULL) return false;
1249: *output_pointer++ = ']';
1250: *output_pointer = '\0';
1251: output_buffer->depth--;
1253: return true;
1254: }
1256: /* Build an object from the text. */
1257: static cJSON_bool parse_object(cJSON *const item, parse_buffer *const input_buffer)
1258: {
1259: cJSON *head = NULL; /* linked list head */
1260: cJSON *current_item = NULL;
1262: if (input_buffer->depth >= CJSON_NESTING_LIMIT) return false; /* to deeply nested */
1263: input_buffer->depth++;
1265: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '{')) goto fail; /* not an object */
1267: input_buffer->offset++;
1268: buffer_skip_whitespace(input_buffer);
1269: if (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == '}')) goto success; /* empty object */
1271: /* check if we skipped to the end of the buffer */
1272: if (cannot_access_at_index(input_buffer, 0)) {
1273: input_buffer->offset--;
1274: goto fail;
1275: }
1277: /* step back to character in front of the first element */
1278: input_buffer->offset--;
1279: /* loop through the comma separated array elements */
1280: do {
1281: /* allocate next item */
1282: cJSON *new_item = cJSON_New_Item(&input_buffer->hooks);
1283: if (new_item == NULL) goto fail; /* allocation failure */
1285: /* attach next item to list */
1286: if (head == NULL) {
1287: /* start the linked list */
1288: current_item = head = new_item;
1289: } else {
1290: /* add to the end and advance */
1291: current_item->next = new_item;
1292: new_item->prev = current_item;
1293: current_item = new_item;
1294: }
1296: /* parse the name of the child */
1297: input_buffer->offset++;
1298: buffer_skip_whitespace(input_buffer);
1299: if (!parse_string(current_item, input_buffer)) goto fail; /* failed to parse name */
1300: buffer_skip_whitespace(input_buffer);
1302: /* swap valuestring and string, because we parsed the name */
1303: current_item->string = current_item->valuestring;
1304: current_item->valuestring = NULL;
1306: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != ':')) goto fail; /* invalid object */
1308: /* parse the value */
1309: input_buffer->offset++;
1310: buffer_skip_whitespace(input_buffer);
1311: if (!parse_value(current_item, input_buffer)) goto fail; /* failed to parse value */
1312: buffer_skip_whitespace(input_buffer);
1313: } while (can_access_at_index(input_buffer, 0) && (buffer_at_offset(input_buffer)[0] == ','));
1315: if (cannot_access_at_index(input_buffer, 0) || (buffer_at_offset(input_buffer)[0] != '}')) goto fail; /* expected end of object */
1317: success:
1318: input_buffer->depth--;
1320: if (head != NULL) head->prev = current_item;
1322: item->type = cJSON_Object;
1323: item->child = head;
1325: input_buffer->offset++;
1326: return true;
1328: fail:
1329: if (head != NULL) cJSON_Delete(head);
1331: return false;
1332: }
1334: /* Render an object to text. */
1335: static cJSON_bool print_object(const cJSON *const item, printbuffer *const output_buffer)
1336: {
1337: unsigned char *output_pointer = NULL;
1338: size_t length = 0;
1339: cJSON *current_item = item->child;
1341: if (output_buffer == NULL) return false;
1343: /* Compose the output: */
1344: length = (size_t)(output_buffer->format ? 2 : 1); /* fmt: {\n */
1345: output_pointer = ensure(output_buffer, length + 1);
1346: if (output_pointer == NULL) return false;
1348: *output_pointer++ = '{';
1349: output_buffer->depth++;
1350: if (output_buffer->format) *output_pointer++ = '\n';
1351: output_buffer->offset += length;
1353: while (current_item) {
1354: if (output_buffer->format) {
1355: size_t i;
1356: output_pointer = ensure(output_buffer, output_buffer->depth);
1357: if (output_pointer == NULL) return false;
1358: for (i = 0; i < output_buffer->depth; i++) *output_pointer++ = '\t';
1359: output_buffer->offset += output_buffer->depth;
1360: }
1362: /* print key */
1363: if (!print_string_ptr((unsigned char *)current_item->string, output_buffer)) return false;
1364: update_offset(output_buffer);
1366: length = (size_t)(output_buffer->format ? 2 : 1);
1367: output_pointer = ensure(output_buffer, length);
1368: if (output_pointer == NULL) return false;
1369: *output_pointer++ = ':';
1370: if (output_buffer->format) *output_pointer++ = '\t';
1371: output_buffer->offset += length;
1373: /* print value */
1374: if (!print_value(current_item, output_buffer)) return false;
1375: update_offset(output_buffer);
1377: /* print comma if not last */
1378: length = ((size_t)(output_buffer->format ? 1 : 0) + (size_t)(current_item->next ? 1 : 0));
1379: output_pointer = ensure(output_buffer, length + 1);
1380: if (output_pointer == NULL) return false;
1381: if (current_item->next) *output_pointer++ = ',';
1383: if (output_buffer->format) *output_pointer++ = '\n';
1384: *output_pointer = '\0';
1385: output_buffer->offset += length;
1387: current_item = current_item->next;
1388: }
1390: output_pointer = ensure(output_buffer, output_buffer->format ? (output_buffer->depth + 1) : 2);
1391: if (output_pointer == NULL) return false;
1392: if (output_buffer->format) {
1393: size_t i;
1394: for (i = 0; i < (output_buffer->depth - 1); i++) *output_pointer++ = '\t';
1395: }
1396: *output_pointer++ = '}';
1397: *output_pointer = '\0';
1398: output_buffer->depth--;
1400: return true;
1401: }
1403: /* Get Array size/item / object item. */
1404: CJSON_PUBLIC(int) cJSON_GetArraySize(const cJSON *array)
1405: {
1406: cJSON *child = NULL;
1407: size_t size = 0;
1409: if (array == NULL) return 0;
1411: child = array->child;
1413: while (child != NULL) {
1414: size++;
1415: child = child->next;
1416: }
1418: /* FIXME: Can overflow here. Cannot be fixed without breaking the API */
1420: return (int)size;
1421: }
1423: static cJSON *get_array_item(const cJSON *array, size_t index)
1424: {
1425: cJSON *current_child = NULL;
1427: if (array == NULL) return NULL;
1429: current_child = array->child;
1430: while ((current_child != NULL) && (index > 0)) {
1431: index--;
1432: current_child = current_child->next;
1433: }
1435: return current_child;
1436: }
1438: CJSON_PUBLIC(cJSON *) cJSON_GetArrayItem(const cJSON *array, int index)
1439: {
1440: if (index < 0) return NULL;
1442: return get_array_item(array, (size_t)index);
1443: }
1445: static cJSON *get_object_item(const cJSON *const object, const char *const name, const cJSON_bool case_sensitive)
1446: {
1447: cJSON *current_element = NULL;
1449: if ((object == NULL) || (name == NULL)) return NULL;
1451: current_element = object->child;
1452: if (case_sensitive) {
1453: while ((current_element != NULL) && (current_element->string != NULL) && (strcmp(name, current_element->string) != 0)) current_element = current_element->next;
1454: } else {
1455: while ((current_element != NULL) && (case_insensitive_strcmp((const unsigned char *)name, (const unsigned char *)current_element->string) != 0)) current_element = current_element->next;
1456: }
1458: if ((current_element == NULL) || (current_element->string == NULL)) return NULL;
1460: return current_element;
1461: }
1463: CJSON_PUBLIC(cJSON *) cJSON_GetObjectItem(const cJSON *const object, const char *const string)
1464: {
1465: return get_object_item(object, string, false);
1466: }
1468: CJSON_PUBLIC(cJSON *) cJSON_GetObjectItemCaseSensitive(const cJSON *const object, const char *const string)
1469: {
1470: return get_object_item(object, string, true);
1471: }
1473: CJSON_PUBLIC(cJSON_bool) cJSON_HasObjectItem(const cJSON *object, const char *string)
1474: {
1475: return cJSON_GetObjectItem(object, string) ? 1 : 0;
1476: }
1478: /* Utility for array list handling. */
1479: static void suffix_object(cJSON *prev, cJSON *item)
1480: {
1481: prev->next = item;
1482: item->prev = prev;
1483: }
1485: /* Utility for handling references. */
1486: static cJSON *create_reference(const cJSON *item, const internal_hooks *const hooks)
1487: {
1488: cJSON *reference = NULL;
1489: if (item == NULL) return NULL;
1491: reference = cJSON_New_Item(hooks);
1492: if (reference == NULL) return NULL;
1494: memcpy(reference, item, sizeof(cJSON));
1495: reference->string = NULL;
1496: reference->type |= cJSON_IsReference;
1497: reference->next = reference->prev = NULL;
1498: return reference;
1499: }
1501: static cJSON_bool add_item_to_array(cJSON *array, cJSON *item)
1502: {
1503: cJSON *child = NULL;
1505: if ((item == NULL) || (array == NULL) || (array == item)) return false;
1507: child = array->child;
1508: /*
1509: * To find the last item in array quickly, we use prev in array
1510: */
1511: if (child == NULL) {
1512: /* list is empty, start new one */
1513: array->child = item;
1514: item->prev = item;
1515: item->next = NULL;
1516: } else {
1517: /* append to the end */
1518: if (child->prev) {
1519: suffix_object(child->prev, item);
1520: array->child->prev = item;
1521: }
1522: }
1524: return true;
1525: }
1527: /* Add item to array/object. */
1528: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToArray(cJSON *array, cJSON *item)
1529: {
1530: return add_item_to_array(array, item);
1531: }
1533: #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
1534: #pragma GCC diagnostic push
1535: #endif
1536: #ifdef __GNUC__
1537: #pragma GCC diagnostic ignored "-Wcast-qual"
1538: #endif
1539: /* helper function to cast away const */
1540: static void *cast_away_const(const void *string)
1541: {
1542: return (void *)string;
1543: }
1544: #if defined(__clang__) || (defined(__GNUC__) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 5))))
1545: #pragma GCC diagnostic pop
1546: #endif
1548: static cJSON_bool add_item_to_object(cJSON *const object, const char *const string, cJSON *const item, const internal_hooks *const hooks, const cJSON_bool constant_key)
1549: {
1550: char *new_key = NULL;
1551: int new_type = cJSON_Invalid;
1553: if ((object == NULL) || (string == NULL) || (item == NULL) || (object == item)) return false;
1555: if (constant_key) {
1556: new_key = (char *)cast_away_const(string);
1557: new_type = item->type | cJSON_StringIsConst;
1558: } else {
1559: new_key = (char *)cJSON_strdup((const unsigned char *)string, hooks);
1560: if (new_key == NULL) return false;
1562: new_type = item->type & ~cJSON_StringIsConst;
1563: }
1565: if (!(item->type & cJSON_StringIsConst) && (item->string != NULL)) hooks->deallocate(item->string);
1567: item->string = new_key;
1568: item->type = new_type;
1570: return add_item_to_array(object, item);
1571: }
1573: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObject(cJSON *object, const char *string, cJSON *item)
1574: {
1575: return add_item_to_object(object, string, item, &global_hooks, false);
1576: }
1578: /* Add an item to an object with constant string as key */
1579: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemToObjectCS(cJSON *object, const char *string, cJSON *item)
1580: {
1581: return add_item_to_object(object, string, item, &global_hooks, true);
1582: }
1584: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToArray(cJSON *array, cJSON *item)
1585: {
1586: if (array == NULL) return false;
1588: return add_item_to_array(array, create_reference(item, &global_hooks));
1589: }
1591: CJSON_PUBLIC(cJSON_bool) cJSON_AddItemReferenceToObject(cJSON *object, const char *string, cJSON *item)
1592: {
1593: if ((object == NULL) || (string == NULL)) return false;
1595: return add_item_to_object(object, string, create_reference(item, &global_hooks), &global_hooks, false);
1596: }
1598: CJSON_PUBLIC(cJSON *) cJSON_AddNullToObject(cJSON *const object, const char *const name)
1599: {
1600: cJSON *null = cJSON_CreateNull();
1601: if (add_item_to_object(object, name, null, &global_hooks, false)) return null;
1603: cJSON_Delete(null);
1604: return NULL;
1605: }
1607: CJSON_PUBLIC(cJSON *) cJSON_AddTrueToObject(cJSON *const object, const char *const name)
1608: {
1609: cJSON *true_item = cJSON_CreateTrue();
1610: if (add_item_to_object(object, name, true_item, &global_hooks, false)) return true_item;
1612: cJSON_Delete(true_item);
1613: return NULL;
1614: }
1616: CJSON_PUBLIC(cJSON *) cJSON_AddFalseToObject(cJSON *const object, const char *const name)
1617: {
1618: cJSON *false_item = cJSON_CreateFalse();
1619: if (add_item_to_object(object, name, false_item, &global_hooks, false)) return false_item;
1621: cJSON_Delete(false_item);
1622: return NULL;
1623: }
1625: CJSON_PUBLIC(cJSON *) cJSON_AddBoolToObject(cJSON *const object, const char *const name, const cJSON_bool boolean)
1626: {
1627: cJSON *bool_item = cJSON_CreateBool(boolean);
1628: if (add_item_to_object(object, name, bool_item, &global_hooks, false)) return bool_item;
1630: cJSON_Delete(bool_item);
1631: return NULL;
1632: }
1634: CJSON_PUBLIC(cJSON *) cJSON_AddNumberToObject(cJSON *const object, const char *const name, const double number)
1635: {
1636: cJSON *number_item = cJSON_CreateNumber(number);
1637: if (add_item_to_object(object, name, number_item, &global_hooks, false)) return number_item;
1639: cJSON_Delete(number_item);
1640: return NULL;
1641: }
1643: CJSON_PUBLIC(cJSON *) cJSON_AddStringToObject(cJSON *const object, const char *const name, const char *const string)
1644: {
1645: cJSON *string_item = cJSON_CreateString(string);
1646: if (add_item_to_object(object, name, string_item, &global_hooks, false)) return string_item;
1648: cJSON_Delete(string_item);
1649: return NULL;
1650: }
1652: CJSON_PUBLIC(cJSON *) cJSON_AddRawToObject(cJSON *const object, const char *const name, const char *const raw)
1653: {
1654: cJSON *raw_item = cJSON_CreateRaw(raw);
1655: if (add_item_to_object(object, name, raw_item, &global_hooks, false)) return raw_item;
1657: cJSON_Delete(raw_item);
1658: return NULL;
1659: }
1661: CJSON_PUBLIC(cJSON *) cJSON_AddObjectToObject(cJSON *const object, const char *const name)
1662: {
1663: cJSON *object_item = cJSON_CreateObject();
1664: if (add_item_to_object(object, name, object_item, &global_hooks, false)) return object_item;
1666: cJSON_Delete(object_item);
1667: return NULL;
1668: }
1670: CJSON_PUBLIC(cJSON *) cJSON_AddArrayToObject(cJSON *const object, const char *const name)
1671: {
1672: cJSON *array = cJSON_CreateArray();
1673: if (add_item_to_object(object, name, array, &global_hooks, false)) return array;
1675: cJSON_Delete(array);
1676: return NULL;
1677: }
1679: CJSON_PUBLIC(cJSON *) cJSON_DetachItemViaPointer(cJSON *parent, cJSON *const item)
1680: {
1681: if ((parent == NULL) || (item == NULL)) return NULL;
1683: if (item != parent->child) {
1684: /* not the first element */
1685: item->prev->next = item->next;
1686: }
1687: if (item->next != NULL) {
1688: /* not the last element */
1689: item->next->prev = item->prev;
1690: }
1692: if (item == parent->child) {
1693: /* first element */
1694: parent->child = item->next;
1695: } else if (item->next == NULL) {
1696: /* last element */
1697: parent->child->prev = item->prev;
1698: }
1700: /* make sure the detached item doesn't point anywhere anymore */
1701: item->prev = NULL;
1702: item->next = NULL;
1704: return item;
1705: }
1707: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromArray(cJSON *array, int which)
1708: {
1709: if (which < 0) return NULL;
1711: return cJSON_DetachItemViaPointer(array, get_array_item(array, (size_t)which));
1712: }
1714: CJSON_PUBLIC(void) cJSON_DeleteItemFromArray(cJSON *array, int which)
1715: {
1716: cJSON_Delete(cJSON_DetachItemFromArray(array, which));
1717: }
1719: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObject(cJSON *object, const char *string)
1720: {
1721: cJSON *to_detach = cJSON_GetObjectItem(object, string);
1723: return cJSON_DetachItemViaPointer(object, to_detach);
1724: }
1726: CJSON_PUBLIC(cJSON *) cJSON_DetachItemFromObjectCaseSensitive(cJSON *object, const char *string)
1727: {
1728: cJSON *to_detach = cJSON_GetObjectItemCaseSensitive(object, string);
1730: return cJSON_DetachItemViaPointer(object, to_detach);
1731: }
1733: CJSON_PUBLIC(void) cJSON_DeleteItemFromObject(cJSON *object, const char *string)
1734: {
1735: cJSON_Delete(cJSON_DetachItemFromObject(object, string));
1736: }
1738: CJSON_PUBLIC(void) cJSON_DeleteItemFromObjectCaseSensitive(cJSON *object, const char *string)
1739: {
1740: cJSON_Delete(cJSON_DetachItemFromObjectCaseSensitive(object, string));
1741: }
1743: /* Replace array/object items with new ones. */
1744: CJSON_PUBLIC(cJSON_bool) cJSON_InsertItemInArray(cJSON *array, int which, cJSON *newitem)
1745: {
1746: cJSON *after_inserted = NULL;
1748: if (which < 0) return false;
1750: after_inserted = get_array_item(array, (size_t)which);
1751: if (after_inserted == NULL) return add_item_to_array(array, newitem);
1753: newitem->next = after_inserted;
1754: newitem->prev = after_inserted->prev;
1755: after_inserted->prev = newitem;
1756: if (after_inserted == array->child) {
1757: array->child = newitem;
1758: } else {
1759: newitem->prev->next = newitem;
1760: }
1761: return true;
1762: }
1764: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemViaPointer(cJSON *const parent, cJSON *const item, cJSON *replacement)
1765: {
1766: if ((parent == NULL) || (replacement == NULL) || (item == NULL)) return false;
1768: if (replacement == item) return true;
1770: replacement->next = item->next;
1771: replacement->prev = item->prev;
1773: if (replacement->next != NULL) replacement->next->prev = replacement;
1774: if (parent->child == item) {
1775: if (parent->child->prev == parent->child) replacement->prev = replacement;
1776: parent->child = replacement;
1777: } else { /*
1778: * To find the last item in array quickly, we use prev in array.
1779: * We can't modify the last item's next pointer where this item was the parent's child
1780: */
1781: if (replacement->prev != NULL) replacement->prev->next = replacement;
1782: if (replacement->next == NULL) parent->child->prev = replacement;
1783: }
1785: item->next = NULL;
1786: item->prev = NULL;
1787: cJSON_Delete(item);
1789: return true;
1790: }
1792: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInArray(cJSON *array, int which, cJSON *newitem)
1793: {
1794: if (which < 0) return false;
1796: return cJSON_ReplaceItemViaPointer(array, get_array_item(array, (size_t)which), newitem);
1797: }
1799: static cJSON_bool replace_item_in_object(cJSON *object, const char *string, cJSON *replacement, cJSON_bool case_sensitive)
1800: {
1801: if ((replacement == NULL) || (string == NULL)) return false;
1803: /* replace the name in the replacement */
1804: if (!(replacement->type & cJSON_StringIsConst) && (replacement->string != NULL)) cJSON_free(replacement->string);
1805: replacement->string = (char *)cJSON_strdup((const unsigned char *)string, &global_hooks);
1806: if (replacement->string == NULL) return false;
1808: replacement->type &= ~cJSON_StringIsConst;
1810: return cJSON_ReplaceItemViaPointer(object, get_object_item(object, string, case_sensitive), replacement);
1811: }
1813: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObject(cJSON *object, const char *string, cJSON *newitem)
1814: {
1815: return replace_item_in_object(object, string, newitem, false);
1816: }
1818: CJSON_PUBLIC(cJSON_bool) cJSON_ReplaceItemInObjectCaseSensitive(cJSON *object, const char *string, cJSON *newitem)
1819: {
1820: return replace_item_in_object(object, string, newitem, true);
1821: }
1823: /* Create basic types: */
1824: CJSON_PUBLIC(cJSON *) cJSON_CreateNull(void)
1825: {
1826: cJSON *item = cJSON_New_Item(&global_hooks);
1827: if (item) item->type = cJSON_NULL;
1829: return item;
1830: }
1832: CJSON_PUBLIC(cJSON *) cJSON_CreateTrue(void)
1833: {
1834: cJSON *item = cJSON_New_Item(&global_hooks);
1835: if (item) item->type = cJSON_True;
1837: return item;
1838: }
1840: CJSON_PUBLIC(cJSON *) cJSON_CreateFalse(void)
1841: {
1842: cJSON *item = cJSON_New_Item(&global_hooks);
1843: if (item) item->type = cJSON_False;
1845: return item;
1846: }
1848: CJSON_PUBLIC(cJSON *) cJSON_CreateBool(cJSON_bool boolean)
1849: {
1850: cJSON *item = cJSON_New_Item(&global_hooks);
1851: if (item) item->type = boolean ? cJSON_True : cJSON_False;
1853: return item;
1854: }
1856: CJSON_PUBLIC(cJSON *) cJSON_CreateNumber(double num)
1857: {
1858: cJSON *item = cJSON_New_Item(&global_hooks);
1859: if (item) {
1860: item->type = cJSON_Number;
1861: item->valuedouble = num;
1863: /* use saturation in case of overflow */
1864: if (num >= INT_MAX) {
1865: item->valueint = INT_MAX;
1866: } else if (num <= (double)INT_MIN) {
1867: item->valueint = INT_MIN;
1868: } else {
1869: item->valueint = (int)num;
1870: }
1871: }
1873: return item;
1874: }
1876: CJSON_PUBLIC(cJSON *) cJSON_CreateString(const char *string)
1877: {
1878: cJSON *item = cJSON_New_Item(&global_hooks);
1879: if (item) {
1880: item->type = cJSON_String;
1881: item->valuestring = (char *)cJSON_strdup((const unsigned char *)string, &global_hooks);
1882: if (!item->valuestring) {
1883: cJSON_Delete(item);
1884: return NULL;
1885: }
1886: }
1888: return item;
1889: }
1891: CJSON_PUBLIC(cJSON *) cJSON_CreateStringReference(const char *string)
1892: {
1893: cJSON *item = cJSON_New_Item(&global_hooks);
1894: if (item != NULL) {
1895: item->type = cJSON_String | cJSON_IsReference;
1896: item->valuestring = (char *)cast_away_const(string);
1897: }
1899: return item;
1900: }
1902: CJSON_PUBLIC(cJSON *) cJSON_CreateObjectReference(const cJSON *child)
1903: {
1904: cJSON *item = cJSON_New_Item(&global_hooks);
1905: if (item != NULL) {
1906: item->type = cJSON_Object | cJSON_IsReference;
1907: item->child = (cJSON *)cast_away_const(child);
1908: }
1910: return item;
1911: }
1913: CJSON_PUBLIC(cJSON *) cJSON_CreateArrayReference(const cJSON *child)
1914: {
1915: cJSON *item = cJSON_New_Item(&global_hooks);
1916: if (item != NULL) {
1917: item->type = cJSON_Array | cJSON_IsReference;
1918: item->child = (cJSON *)cast_away_const(child);
1919: }
1921: return item;
1922: }
1924: CJSON_PUBLIC(cJSON *) cJSON_CreateRaw(const char *raw)
1925: {
1926: cJSON *item = cJSON_New_Item(&global_hooks);
1927: if (item) {
1928: item->type = cJSON_Raw;
1929: item->valuestring = (char *)cJSON_strdup((const unsigned char *)raw, &global_hooks);
1930: if (!item->valuestring) {
1931: cJSON_Delete(item);
1932: return NULL;
1933: }
1934: }
1936: return item;
1937: }
1939: CJSON_PUBLIC(cJSON *) cJSON_CreateArray(void)
1940: {
1941: cJSON *item = cJSON_New_Item(&global_hooks);
1942: if (item) item->type = cJSON_Array;
1944: return item;
1945: }
1947: CJSON_PUBLIC(cJSON *) cJSON_CreateObject(void)
1948: {
1949: cJSON *item = cJSON_New_Item(&global_hooks);
1950: if (item) item->type = cJSON_Object;
1952: return item;
1953: }
1955: /* Create Arrays: */
1956: CJSON_PUBLIC(cJSON *) cJSON_CreateIntArray(const int *numbers, int count)
1957: {
1958: size_t i = 0;
1959: cJSON *n = NULL;
1960: cJSON *p = NULL;
1961: cJSON *a = NULL;
1963: if ((count < 0) || (numbers == NULL)) return NULL;
1965: a = cJSON_CreateArray();
1967: for (i = 0; a && (i < (size_t)count); i++) {
1968: n = cJSON_CreateNumber(numbers[i]);
1969: if (!n) {
1970: cJSON_Delete(a);
1971: return NULL;
1972: }
1973: if (!i) {
1974: a->child = n;
1975: } else {
1976: suffix_object(p, n);
1977: }
1978: p = n;
1979: }
1981: if (a && a->child) a->child->prev = n;
1983: return a;
1984: }
1986: CJSON_PUBLIC(cJSON *) cJSON_CreateFloatArray(const float *numbers, int count)
1987: {
1988: size_t i = 0;
1989: cJSON *n = NULL;
1990: cJSON *p = NULL;
1991: cJSON *a = NULL;
1993: if ((count < 0) || (numbers == NULL)) return NULL;
1995: a = cJSON_CreateArray();
1997: for (i = 0; a && (i < (size_t)count); i++) {
1998: n = cJSON_CreateNumber((double)numbers[i]);
1999: if (!n) {
2000: cJSON_Delete(a);
2001: return NULL;
2002: }
2003: if (!i) {
2004: a->child = n;
2005: } else {
2006: suffix_object(p, n);
2007: }
2008: p = n;
2009: }
2011: if (a && a->child) a->child->prev = n;
2013: return a;
2014: }
2016: CJSON_PUBLIC(cJSON *) cJSON_CreateDoubleArray(const double *numbers, int count)
2017: {
2018: size_t i = 0;
2019: cJSON *n = NULL;
2020: cJSON *p = NULL;
2021: cJSON *a = NULL;
2023: if ((count < 0) || (numbers == NULL)) return NULL;
2025: a = cJSON_CreateArray();
2027: for (i = 0; a && (i < (size_t)count); i++) {
2028: n = cJSON_CreateNumber(numbers[i]);
2029: if (!n) {
2030: cJSON_Delete(a);
2031: return NULL;
2032: }
2033: if (!i) {
2034: a->child = n;
2035: } else {
2036: suffix_object(p, n);
2037: }
2038: p = n;
2039: }
2041: if (a && a->child) a->child->prev = n;
2043: return a;
2044: }
2046: CJSON_PUBLIC(cJSON *) cJSON_CreateStringArray(const char *const *strings, int count)
2047: {
2048: size_t i = 0;
2049: cJSON *n = NULL;
2050: cJSON *p = NULL;
2051: cJSON *a = NULL;
2053: if ((count < 0) || (strings == NULL)) return NULL;
2055: a = cJSON_CreateArray();
2057: for (i = 0; a && (i < (size_t)count); i++) {
2058: n = cJSON_CreateString(strings[i]);
2059: if (!n) {
2060: cJSON_Delete(a);
2061: return NULL;
2062: }
2063: if (!i) {
2064: a->child = n;
2065: } else {
2066: suffix_object(p, n);
2067: }
2068: p = n;
2069: }
2071: if (a && a->child) a->child->prev = n;
2073: return a;
2074: }
2076: /* Duplication */
2077: CJSON_PUBLIC(cJSON *) cJSON_Duplicate(const cJSON *item, cJSON_bool recurse)
2078: {
2079: cJSON *newitem = NULL;
2080: cJSON *child = NULL;
2081: cJSON *next = NULL;
2082: cJSON *newchild = NULL;
2084: /* Bail on bad ptr */
2085: if (!item) goto fail;
2086: /* Create new item */
2087: newitem = cJSON_New_Item(&global_hooks);
2088: if (!newitem) goto fail;
2089: /* Copy over all vars */
2090: newitem->type = item->type & (~cJSON_IsReference);
2091: newitem->valueint = item->valueint;
2092: newitem->valuedouble = item->valuedouble;
2093: if (item->valuestring) {
2094: newitem->valuestring = (char *)cJSON_strdup((unsigned char *)item->valuestring, &global_hooks);
2095: if (!newitem->valuestring) goto fail;
2096: }
2097: if (item->string) {
2098: newitem->string = (item->type & cJSON_StringIsConst) ? item->string : (char *)cJSON_strdup((unsigned char *)item->string, &global_hooks);
2099: if (!newitem->string) goto fail;
2100: }
2101: /* If non-recursive, then we're done! */
2102: if (!recurse) return newitem;
2103: /* Walk the ->next chain for the child. */
2104: child = item->child;
2105: while (child != NULL) {
2106: newchild = cJSON_Duplicate(child, true); /* Duplicate (with recurse) each item in the ->next chain */
2107: if (!newchild) goto fail;
2108: if (next != NULL) {
2109: /* If newitem->child already set, then crosswire ->prev and ->next and move on */
2110: next->next = newchild;
2111: newchild->prev = next;
2112: next = newchild;
2113: } else {
2114: /* Set newitem->child and move to it */
2115: newitem->child = newchild;
2116: next = newchild;
2117: }
2118: child = child->next;
2119: }
2120: if (newitem && newitem->child) newitem->child->prev = newchild;
2122: return newitem;
2124: fail:
2125: if (newitem != NULL) cJSON_Delete(newitem);
2127: return NULL;
2128: }
2130: static void skip_oneline_comment(char **input)
2131: {
2132: *input += static_strlen("//");
2134: for (; (*input)[0] != '\0'; ++(*input)) {
2135: if ((*input)[0] == '\n') {
2136: *input += static_strlen("\n");
2137: return;
2138: }
2139: }
2140: }
2142: static void skip_multiline_comment(char **input)
2143: {
2144: *input += static_strlen("/*");
2146: for (; (*input)[0] != '\0'; ++(*input)) {
2147: if (((*input)[0] == '*') && ((*input)[1] == '/')) {
2148: *input += static_strlen("*/");
2149: return;
2150: }
2151: }
2152: }
2154: static void minify_string(char **input, char **output)
2155: {
2156: (*output)[0] = (*input)[0];
2157: *input += static_strlen("\"");
2158: *output += static_strlen("\"");
2160: for (; (*input)[0] != '\0'; (void)++(*input), ++(*output)) {
2161: (*output)[0] = (*input)[0];
2163: if ((*input)[0] == '\"') {
2164: (*output)[0] = '\"';
2165: *input += static_strlen("\"");
2166: *output += static_strlen("\"");
2167: return;
2168: } else if (((*input)[0] == '\\') && ((*input)[1] == '\"')) {
2169: (*output)[1] = (*input)[1];
2170: *input += static_strlen("\"");
2171: *output += static_strlen("\"");
2172: }
2173: }
2174: }
2176: CJSON_PUBLIC(void) cJSON_Minify(char *json)
2177: {
2178: char *into = json;
2180: if (json == NULL) return;
2182: while (json[0] != '\0') {
2183: switch (json[0]) {
2184: case ' ':
2185: case '\t':
2186: case '\r':
2187: case '\n':
2188: json++;
2189: break;
2191: case '/':
2192: if (json[1] == '/') {
2193: skip_oneline_comment(&json);
2194: } else if (json[1] == '*') {
2195: skip_multiline_comment(&json);
2196: } else {
2197: json++;
2198: }
2199: break;
2201: case '\"':
2202: minify_string(&json, (char **)&into);
2203: break;
2205: default:
2206: into[0] = json[0];
2207: json++;
2208: into++;
2209: }
2210: }
2212: /* and null-terminate. */
2213: *into = '\0';
2214: }
2216: CJSON_PUBLIC(cJSON_bool) cJSON_IsInvalid(const cJSON *const item)
2217: {
2218: if (item == NULL) return false;
2220: return (item->type & 0xFF) == cJSON_Invalid;
2221: }
2223: CJSON_PUBLIC(cJSON_bool) cJSON_IsFalse(const cJSON *const item)
2224: {
2225: if (item == NULL) return false;
2227: return (item->type & 0xFF) == cJSON_False;
2228: }
2230: CJSON_PUBLIC(cJSON_bool) cJSON_IsTrue(const cJSON *const item)
2231: {
2232: if (item == NULL) return false;
2234: return (item->type & 0xff) == cJSON_True;
2235: }
2237: CJSON_PUBLIC(cJSON_bool) cJSON_IsBool(const cJSON *const item)
2238: {
2239: if (item == NULL) return false;
2241: return (item->type & (cJSON_True | cJSON_False)) != 0;
2242: }
2243: CJSON_PUBLIC(cJSON_bool) cJSON_IsNull(const cJSON *const item)
2244: {
2245: if (item == NULL) return false;
2247: return (item->type & 0xFF) == cJSON_NULL;
2248: }
2250: CJSON_PUBLIC(cJSON_bool) cJSON_IsNumber(const cJSON *const item)
2251: {
2252: if (item == NULL) return false;
2254: return (item->type & 0xFF) == cJSON_Number;
2255: }
2257: CJSON_PUBLIC(cJSON_bool) cJSON_IsString(const cJSON *const item)
2258: {
2259: if (item == NULL) return false;
2261: return (item->type & 0xFF) == cJSON_String;
2262: }
2264: CJSON_PUBLIC(cJSON_bool) cJSON_IsArray(const cJSON *const item)
2265: {
2266: if (item == NULL) return false;
2268: return (item->type & 0xFF) == cJSON_Array;
2269: }
2271: CJSON_PUBLIC(cJSON_bool) cJSON_IsObject(const cJSON *const item)
2272: {
2273: if (item == NULL) return false;
2275: return (item->type & 0xFF) == cJSON_Object;
2276: }
2278: CJSON_PUBLIC(cJSON_bool) cJSON_IsRaw(const cJSON *const item)
2279: {
2280: if (item == NULL) return false;
2282: return (item->type & 0xFF) == cJSON_Raw;
2283: }
2285: CJSON_PUBLIC(cJSON_bool) cJSON_Compare(const cJSON *const a, const cJSON *const b, const cJSON_bool case_sensitive)
2286: {
2287: if ((a == NULL) || (b == NULL) || ((a->type & 0xFF) != (b->type & 0xFF))) return false;
2289: /* check if type is valid */
2290: switch (a->type & 0xFF) {
2291: case cJSON_False:
2292: case cJSON_True:
2293: case cJSON_NULL:
2294: case cJSON_Number:
2295: case cJSON_String:
2296: case cJSON_Raw:
2297: case cJSON_Array:
2298: case cJSON_Object:
2299: break;
2301: default:
2302: return false;
2303: }
2305: /* identical objects are equal */
2306: if (a == b) return true;
2308: switch (a->type & 0xFF) {
2309: /* in these cases and equal type is enough */
2310: case cJSON_False:
2311: case cJSON_True:
2312: case cJSON_NULL:
2313: return true;
2315: case cJSON_Number:
2316: if (compare_double(a->valuedouble, b->valuedouble)) return true;
2317: return false;
2319: case cJSON_String:
2320: case cJSON_Raw:
2321: if ((a->valuestring == NULL) || (b->valuestring == NULL)) return false;
2322: if (strcmp(a->valuestring, b->valuestring) == 0) return true;
2324: return false;
2326: case cJSON_Array: {
2327: cJSON *a_element = a->child;
2328: cJSON *b_element = b->child;
2330: for (; (a_element != NULL) && (b_element != NULL);) {
2331: if (!cJSON_Compare(a_element, b_element, case_sensitive)) return false;
2333: a_element = a_element->next;
2334: b_element = b_element->next;
2335: }
2337: /* one of the arrays is longer than the other */
2338: if (a_element != b_element) return false;
2340: return true;
2341: }
2343: case cJSON_Object: {
2344: cJSON *a_element = NULL;
2345: cJSON *b_element = NULL;
2346: cJSON_ArrayForEach(a_element, a)
2347: {
2348: /* TODO This has O(n^2) runtime, which is horrible! */
2349: b_element = get_object_item(b, a_element->string, case_sensitive);
2350: if (b_element == NULL) return false;
2352: if (!cJSON_Compare(a_element, b_element, case_sensitive)) return false;
2353: }
2355: /* doing this twice, once on a and b to prevent true comparison if a subset of b
2356: * TODO: Do this the proper way, this is just a fix for now */
2357: cJSON_ArrayForEach(b_element, b)
2358: {
2359: a_element = get_object_item(a, b_element->string, case_sensitive);
2360: if (a_element == NULL) return false;
2362: if (!cJSON_Compare(b_element, a_element, case_sensitive)) return false;
2363: }
2365: return true;
2366: }
2368: default:
2369: return false;
2370: }
2371: }
2373: CJSON_PUBLIC(void *) cJSON_malloc(size_t size)
2374: {
2375: return global_hooks.allocate(size);
2376: }
2378: CJSON_PUBLIC(void) cJSON_free(void *object)
2379: {
2380: global_hooks.deallocate(object);
2381: }